Driving mechanism



H. L. FISHER.

DRIVING MECHANISM.

I APPLICATION FILED JULY 22|19I8- v 1,394,986, Patented OBI]. 25,1921;

1 2 s sum|. I 33 @9 21 L74 37" 6 45 I 36 i 4 Q6 H. L. FISHER.

DRIVING MECHANISM.

APPLICAHON FILED JULY 22, 1918. I 1,394,986. Patented Oct. 25, 1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

HARVEY L. FISHER, OF CHICAGO, ILLINOIS, ASSIGNOB TO THE DONALDSON &, FISHER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ARIZONA.

DRIVING MECHANISM.

Application filed July 22,

T 0 all whom it may concern:

Be it known that I, HAnvnY L. Frsrrnn, a citizen of the United States, residing in Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Driving Mechanism, of which the following is a specification.

My invention relates more particularly to driving mechanism for motor trucks of that type'in which an internal gear is connected to each driving wheel and is driven by means of a drive shaft and pinion, and an idler gear meshing with the pinion and internal gear. The object of my invention is to provide a mechanism of this character which is relatively simple and possesses the maximum strength with a minimum of material and is relatively inexpensive to manufacture and assemble.

In the accompanying drawings I have shown two somewhat different embodiments of the invention, and have described the same in detail in the following specification; it is to be understood, however, that the specific disclosure is for the purpose of exemplification only, and that the scope of the invention is defined in the following claims in which I have endeavored to distinguish it from the prior art so far as known to me without, however, relinquishing orabandonin any portion or feature thereof.

eferring to the drawings, Figure 1 is a vertical axial section through an axle and wheel embodying my invention, parts being shown in elevation; Fig. 2 is a vertical section on a plane perpendicular to the plane of Fig. 1 on'the line 2 thereof, looking in the direction of the arrow; Fig. 3 is a similar section on the line 3-3 of Fig. 1; Fig. 4 is 'a perspective view of an axle forging constituting a part of the improved construction; Fig. .5 is a vertical section of a detail; Fig. 6 is a vertical axial section similar to Fig. 1, but showing a somewhat modified form of the,device;'and.Fig. 7 is a transverse vertical section on the line 77 of Fig. 6. Each part is identified. by the same reference character wherever it occurs throughout the several views. v

Referring first to that formof the invention shown in Figs. 1 to 5 inclusive, it comprises an axle forging 8 which is mounted on the end of an axle tube 9 in a manner which will presently be described. As seen more particularly in Figs. 1 and 4 the forging Specification of Letters Patent.

Patented Oct. 25, 1921.

Serial No. 246,030.

comprises an enlarged tubular or chambered portion 8 a reduced tubular portion 10, and a reduced bearingportion 11, said reduced portions being respectively on opposite sides of the enlarged portion of the forging. The forging is bored at 12 to form a coaxial cylindrical chamber or bore extending longitudinally of the intermediate section 8 and tubular section 10, but terminating short of the end face 13 of the former as shown more particularly in Fig. 1. The chamber 12 is of such diameter as to permit the insertion of the pinion 14 therein which pinion is located so as to just clear the inner face 15 of the end wall of the enlarged intermediate section of the forging, and is mounted on and splined to the end 14 of a drive shaft 16 which is coaxial with the bore of the forging adjacent the pinion 14. The drive shaft is provided with a roller bearing 18 which may be of any usual or approved design. After the pinion, bearing and shaft have been inserted the sleeve or axle tube 9 is driven into position in the tubular portion of the forging as shown in Fig. 1. Preferably the tube has a driving fit' at its inner end and for this purpose it is reduced and shouldered'at 19 and provided with an annulus 2O closely fitted thereon. said annulus having a driving fit within the hollow of the forging and the tube, being of somewhat smaller diameter. The tubular end of the forging is split at 21 and provided with a split bushing 22 fitting within a shouldered recess 23 in the end of the bore of the forging the interior diameter of the bushing being of a size to closely fit the axle tube 9. The end of the forging is clamped between blocks 24, 25, the upper block 24 constituting a pad or rest for the usual spring 26. Bolts 27 and a plate 28 are used to clamp the spring to the pad, said bolts extending through the blocks 24. 25 and serving also to draw the blocks together to compress the split end of the forging about the sleeve, to hold the latter in position.

The wheel is journaled upon the axle with the usual roller bearing 29 between the hub 30 and the reduced journal portion 11 of the forging, and a casing section or disk 31 is formed integral with the hub for the purpose of inclosing the driving gear. The spokes of the wheel are shown at 32. The internal gear 33 is bolted between the casing section 31 and easing section 34, the latter of gage the latter. Idler 36 is journaled upon a stud 37 which is carried by an arm or bracket 38 secured to the forging. For this purpose the outer end of the intermediate cylindrical enlargement of the forging is slightly reduced at 39 to form a shoulder 40 and again reduced at 41 to form a second shoulder. The arm 38 isprovided with a rabbeted opening which fits upon the end of the enlarged intermediate portion of the axle casting, the rabbet providing an overhanging portion or flange 42 which rests against the outer face of the enlarged portion of the forging. The arm is held in position on the forging by means of bolts 43 which extend through the enlarged portion of the forging and the blocks 24, 25.

Referring more particularly to Figs. 1 and 5, it will be seen that the neck 35 is formed on its inner surface and near the outer end thereof with an annular groove 44 and between said groove and its inner end with a helical groove 45 for the purpose of intercepting any leakage of oil, the helical groove being so pitched as to feed back into the casing any oil which escapes into said neck. The blocks 24 and 25 which are joined together by'means of the bolts 27 are prevented from slipping longitudinallyv of the axle forging by means of a short cylinder 46 of metal which occupies an opening 47 in the forging and registering seat 48, 49 in the upper block 24 and axle sleeve 9 respectively.

In. the form of the invention shown in Figs. 6 and 7 the construction is or may be substantially the same in all respects except that the tubular end of the forging is eccentric to the intermediate enlarged portion and to the wheel bearing. e

lifIy invention provides a simple compact construction which may be manufactured cheaply and without special machinery and may be assembled and taken apart when desired. In assembling, the drive shaft and pinion are inserted in the hollow of the forging, the arm with its idler pinion secured in position after the casin head 34 has been put in position and then the wheel carrying the remainderof the casing and the internal gear slipped onto its bearing. The casingis then bolted together; A. pool of oil is maintained in the casing the depth of ing the parts well lubricated. A further 55,-.

supply .of oil may be received 10 .1 time ate portion may be made of smaller diam-' eter, it being sufficient to provide the bolts for holding the arm on the forging in the lower thicker portion 44 of the intermediate enlargement of the forging. In this construction therefore the neck may be made of smaller diameter and the pool of oil in the casing can be maintained of somewhat greater depth, than in the concentric form of the device shown in Figs. 1 to 5. In either form of device the parts are thoroughly protected against dust and injury and the construction is more sightly than in the driving mechanism in common use for trucks in which the jack shaft carrying the driving pinion is outside the supporting axle. I

I claim: I v

1. In a device of the class described,-an axle forging comprising a reduced wheel bearing, at one end, a tubular portion at the other end, a drive shaft and pinion with in the tubular portion, a wheel journaled on the forging, an internal gear carried by the wheel and an idler between the internal gear and the pinion. v

2. In a device of the class described, an axle forging comprisinga reducedbearing at one end thereof and a split tube at the other, a driving shaft and pinion within the split tube, an axle tube withinthe split tube and surrounding the drive shaft, means for compressing the split tube about the axle tube, awheel on-the bearing,an internal gear on the wheel and anidler between the internal gear and said pinion. 7 1

3. In a device of the class described, an axle for 'ing comprising a wheel bearing and a tubular portion, said tubular portion being split, a pinion within the tubular portion, a bearing for the drive shaft within said tubular portion, an axle tube having an annulus on the end thereof, having a driving fit within the tubular portion of the forging, means for clamping they split tube about the axle tube, a wheel journaled on the bearing, an internal gear on the wheel and an idler between said internal gear and said pinion.

4. In a device of g the. class described, I a forging having a wheel bearing thereon and the forging, said tubular member being split, a split annulus Within the tubular member, bolts for compressing the split annulus about the axle tube, a wheel journaled 0n the bearing, an internal gear mounted on the Wheel and an idler between said internal gear and pinion.

5. In a device of the class described, an

axle forging, a Wheel journaled thereon, a

casing carried by the Wheel, gearing Within 10 the casing for drivin the Wheel, a neck on the casing closely surrounding the forging having a spiral groove on the inner surface thereof adapted to return oil to the interior of the casing.

HARVEY L. FISHER. 

